Shaper for swaged saw-teeth.



' W. R. ANTHONY. SHAPER FOR SWAGED SAW TEETH.

APPLICATION FILED MAY 9, 1908.

, 935,138 Patented Sept. 28, 1909.

\N @N P KFN N WILLIAM RICHARD ANTHONY, OF MEMPHIS, TENNESSEE.

SHAPER FOR SWAGED SAW-TEETH.

Specification of Letters Patent. Patented Sept. 28, 1909.

Application filed May 9, 1908. Serial No. 431,947.

T 0 all whom it may concern:

Be it known that I, WILLIAM R; ANTHONY, a citizen of the United States,residing at Memphis, in the county of Shelby and State of Tennessee,have invented a new and useful Shaper for Swaged Saw-Teeth, of which thefollowing is a specification.

This invention relates to shapers for swaged saw teeth, andhas for anobject to provide a tool for side dressing the swaged points of sawteeth by applying pressure simultaneously on each side of a tooth,thereby producing a durable keen cutting side dress that insures smooth,straight and rapid sawing and an economical use of power.

Another object of the invention pertains to its simplicity ofconstruction combined with strength and a minimum number of detachableparts, whereby speed and ease of operation and great etliciency areobtained.

A further object of the invention applies to the easy adjustability ofits parts to all conditions of saws and shapes of teeth for correctingirregularities therein and, by compression, change the uneven sides ofswaged teeth into correct and uniform shape giving strength to the sharpcorners and just the proper clearance necessary for rapid work. I

With these and other objects in view the invention consists of the novelconstruction, combination and arrangement of parts hereinafter describedand claimed, and illustrated in the accompanying drawing in which;

Figure 1 is a view in elevation of the right side of the tool complete;Fig. 2 a rear end view; Fig. 3 a bottom plan view; Fig. 4 a verticallongitudinal sectional view of the tool on the line 4-4 of Fig. 2;'Fig.5 a central transverse sectional view on the line 55 of Fig. 3; Fig. 6 adetail View in elevation of the swaging dies, enlarged; Fig. 7 an endview of the relatively fixed die; Fig. 8 a top plan view of the twoswaging dies; Fig. 9 a sectional view on theline 99 of Fig. 8, and Figs.10 and 11 side views of portions of two forms of the die operatinghandle. 7

Similar reference numerals are used for the same parts in all thefigures.

Referring to the drawings, the numeral 1 indicates the body of the toolin which are carried the swaging dies 2 and 3, said body comprising ablock of steel or other hard, strong material provided with a narrowslot 4 in its under side extending from the front to the rear thereofand reaching about onehalf the height of the block, through which slotthe saw teeth pass while being shaped. A cylindrical socket 5 in thelower half of the body extends perpendicularly acrossthe slot 4. andopen at one end to receive the movable swaging die 2, and the relativelyfixed swaging die 3.

The movable die 2 abuts at its outer end, when inoperative, against thebottom of the socket 5, it being retained in this position by a spring6, here represented as a helical spring, fastened at one end to thebottom of the block by a screw or bolt 7, and having its free end bentupwardly and extending through a longitudinal slot 3, in the body 1 intoa notch 9 made in the under side of the die 6. The relatively fixed die3 is prevented from moving axially except when adjust ed by a screw plug10 threaded into the open end of'the cylindrical socket 5, which plugserves as an abutment for the outer end of the die 3. The screw plug 10when turned in the proper direction pushes the die 3 intothe slot 4:.This is necessary to keep the face of the die properly positioned in theslot, as the face is worn away when reground. The inner end or workingface 11 of the movable die 2 is substantially flush with the wall of theslot on that side when the die is in normal position, but can be movedaxially across the slot by means hereinafter described. The dies 2 and3, connected by a pin 14: are adjusted to the pitch of saw teeth byrotating two horizontally disposed bolts 12 threaded into the body fromfront and rear, and abutting against a tongue 13 formed on the bottom ofthe die 3 at its outer end by cutting away the material of the die oneach side. The inner ends of the bolts 12 bear constantly on the tongueand hold the die 3 securely in adjusted position. The pin 14 is slidablymounted in openings 15 in the two dies and extends parallel to theircommon axis across the slot 4 to form a stop or abutment for the sawteeth; to hold the movable die 2 in fixed relation to the die 3 when thedie 2 is moved endwise, and to cause the movable die 2 to turn in unisonwith the relatively fixed die 3 when the latter is adjusted by the bolts12 to the pitch of the saw teeth.

Threaded into the end of the body or block 1 opposite the screw plug 10is a screw stem 16 its end operatively engaged against the outer end ofthe movable die 2 to forceit toward the die 3 when turned by a handle 17fitted on a polygonal head 18 on the outer end of said threaded stem andheld in place thereon by a nut 19 screwed on a reduced portion of saidstem outside the polygonal head.

In the front and rear sides, respectively, of the body or block 1 isformed a shallow recess 20 extending from the top of the blockdownwardly below the top of the saw groove 4 and laterally on each sideof the same, in which recesses are snugly seated the upright members 21of a supporting frame 22 which guide the body 1 as it is movedvertically. The supportingframe 22 comprises a straight flat bar with acentral arch of which 21 are the side members and 23 the top connectingmember. At each end, the supporting frame is provided with two laterallyspaced downwardly projecting fingers 22 which straddle the saw teeth andguide the tool in the course of operation. To resist the wear of the sawteeth, hardened steel plates 21 are secured to the under side of thesupporting frame 22 in a detachable manner so that they can be removedfor trueing when worn by use.

Fixed in the top of the body 1 is a vertically disposed screw stud bolt25 which passes freely through a hole in the connecting member 23 of thesupporting frame 22, on which a knurled edged thumb nut 26 is threadedbelow the connecting member 23, and a wing nut 27 is screwed on the sameabove said connecting member. By means of these two nuts the body 1,carrying the shaping dies 2 and 3, is raised and lowered in thesupporting frame to accommodate the width of the swaged points of sawteeth, and be locked securely when the proper position has beenobtained.

The tool is manipulated by a handle 28 on the left thereof parallel tothe supporting frame 22, and attached to the body by means of anL-shaped shank 29 fitted into a socket bored in the left side of saidbody or block and secured rigidly therein by a bolt 30.

The operating orshaping faces 11 of the dies 2 and 3 are perpendicularto their common axis and situated on opposite sides of the saw slot 1 aspreviously described. One side 31 of each die face 11 is beveled from astraight line 32 running diagonally across said face as shown, theintersections of said line with the periphery of the die being indicatedon the side of said die by lines 33 and 34. The beveled surfaces 31 areon the upper and forward sides of the two die faces 11 and in suchposition that the line or angle 32 determines or limits the lateralangular spread or set of the saw teeth points.

I Opposite the beveled surfaces 31, the outer edges of the two die facesare chamfered as at 35 to permit the saw teeth entering easily Thepolygonal head18 on the screw stem 16 which operates the movable die 2may be hexagonal, octagonal or have any other number of sides desired,and is preferably tapered outwardly, as shown in Fig. 5. The handle 17which turns the screw stem is as thick at the eye end as said head iswide and has its polygonal eye 36 tapered from both sides of the handletoward the center, thus enabling it to be placed on the head from eitherside which, owing to the partic ular angular relation the sides of theeye. bear toward the longitudinal axis of the handle, enables the handleto be placed on the head in twice as many positions'as there 1 are sidesto the head 18 and eye 36. This is accomplished in the mannerrepresented in Figs. 10 and 11, Fig. 10 showing a handle with ahexagonal eye and Fig. 11 one with an; eye of octagonal shape. As thereshown the axis ofeach handle passes tlirough the center of its eye onthe line a, b. The angle 0, 'b, d, Fig. 10 is equal to' sixty degrees,therefore the chord e, of itsfincluded arc f, 9, forms one side of thehexagonal eye 36. This chord e, is disposed at such an angle to the axisa, b, that the angle 0, 6, (Z, is divided by said axis into two unequalangles one a, b, 0, of fifteen degrees, and the other a, b, d, offorty-five degrees, or one-fourth and three-fourths, respectively, ofthe angle 0, Z), d. An octagonal or other shaped eye will have its sidesso disposed that the angle c, Z), (Z, including one of its sides will bedivided by the axis a, 6, into like proportional parts. From this itwill be clear that if the head 18 happens to be for examplehexagonal'and in such position that an angle or corner thereof bevertically above its center, and the handle 17 placed on the head sothat the line 0, I), passed vertically through said corner, the axis a,b, of the handle will form an angle of fifteen degrees with c, b, or onefourth that of'o, Z), d, while if the handle be turned over'and itsopposite side placed next the tool so that d, b, will pass verticallythrough the aforesaid corner, the axis a, b, will 'orm an angletherewith of forty five degrees or three fourths that of 0,Z ,d.' 1

Deducting the angle tub, c, fifteen degrees, theja ngle of the firstposition of the handle from the angle a, b, d, forty five degrees,"theangle of the second position of the handle leaves an angle of thirtydegrees or one twelfth of a circle, thus giving twelve angular positionsfor the handle'with a hexagonal eye. A similar application of'thisprincipal to other polygonal forms will give twice as many angularpositions for-the handle as the eyehas sides. 1

To operate the tool, the body or block 1 first adjusted vertically bythe nuts 26 and 27 and the dies 2 and 3 angularly set by the bolts 12 tothe pitch of the saw teeth to be shaped. The saw being secured with itsteeth uppermost, the handle 28 is grasped by the left hand and placedover the saw, the teeth of which enter the groove 4 of the body andbetween the fingers 22 until the hardened plates 24 of the supportingframe 22 rest on the points of the teeth. The tool is then drawnrearwardly until the pin 14k, across the 'roove 4 strikes the under sideof a tooth and arrests the tool. The handle 17 is now seized and drawnrearwardly, it having been previously set at the proper angle in themanner hereinabove explained, turning the screw stem 16 which movesinwardly and forces the movable die 2 against the saw tooth and thelatter against the relatively fixed die 3. Continued movement of thehandle 17 presses the swaged point of the tooth between the dies withsufficient power to correct any irregularity therein, change the unevensides caused by swaging and bring the tooth to a correct and uniformshape and proper clearance. After shaping the tooth the handle 17 ispushed forward to back the screw stem 16 and permit the movable die toretract under the force of the spring 6. The tool is then pushed forwardto the next tooth and the operation repeated as rapidly as the operatorcan work the lever or handle 17 What is claimed is 1. A shaper forswaged saw teeth comprising a supporting frame, a grooved block or bodycarried in said frame, opposing dies having like beveled faces openinginto the groove in said body, one of which dies is movable, means foroperating said movable die, and means for rotatably adjusting said diesin said body.

2. A shaper for swaged saw teeth comprising a supporting frame, agrooved body carried in said frame, a relatively fixed die and alongitudinally movable die having a common axis perpendicular to thegroove in said body, said dies having like beveled faces, a slidableconnection between said dies across said groove, means acting directlyon said relatively fixed die for rotatably adjusting both of said diesin said body, and means for operating the movable die.

3. A tool of the character described having a grooved body provided witha rela tively fixed die and a movable die on a common axis perpendicularto the groove in said body and disposed on opposite sides thereof withopposed like beveled faces, a slidable connection between the two dies,means for rotatably adjusting said relatively fixed die and through saidslidable connection the movable die, means for advancing the movabledie, and separate means for retracting the same.

4. A tool of the character described comprising a grooved body, arelatively fixed die and a longitudinally movable die carried by saidbody in the same axial line perpendicular to said groove, said dieshaving like beveled faces, a slidable connection between said dies,means for advancing the movable die toward the fixed die, and means forrotatably adjusting said dies.

5. A tool of the character described comprising a supporting framehaving a central arch, a slotted body vertically movable in said arch,means for adjusting said body in said arch and locking it fast afteradjustment, guide fingers depending from the ends of the supportingframe and shaping dies carried by said body.

6. A tool of the character described comprising a body grooved on itsunder side and having a cylindrical socket perpendicular to and crossingsaid groove, a movable die on one side of said groove and a relativelyfixed die on the opposite side thereof, said dies having like parallelopposing faces each beveled on one side, and chamfered at the edgeopposite said side, a slidable connecting means between the two dies andcrossing said groove, and independent means for operating said movabledie in opposite directions.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

WILLIAM RICHARD ANTHONY.

lVitnesses L. D. GU'rHRIn, W. R. SIMS.

